ganttrenderer.java

jfreechart-1.0.12.zip 可以用来作图

            double rectStart = calculateBarW0(plot, plot.getOrientation(),
                    dataArea, domainAxis, state, row, column);
            double rectLength = Math.abs(translatedValue1 - translatedValue0);
            double rectBreadth = state.getBarWidth();

            // DRAW THE BARS...
            Rectangle2D bar = null;
            RectangleEdge barBase = null;
            if (plot.getOrientation() == PlotOrientation.HORIZONTAL) {
                bar = new Rectangle2D.Double(translatedValue0, rectStart,
                        rectLength, rectBreadth);
                barBase = RectangleEdge.LEFT;
            }
            else if (plot.getOrientation() == PlotOrientation.VERTICAL) {
                bar = new Rectangle2D.Double(rectStart, translatedValue0,
                        rectBreadth, rectLength);
                barBase = RectangleEdge.BOTTOM;
            }

            Rectangle2D completeBar = null;
            Rectangle2D incompleteBar = null;
            Number percent = dataset.getPercentComplete(row, column,
                    subinterval);
            double start = getStartPercent();
            double end = getEndPercent();
            if (percent != null) {
                double p = percent.doubleValue();
                if (orientation == PlotOrientation.HORIZONTAL) {
                    completeBar = new Rectangle2D.Double(translatedValue0,
                            rectStart + start * rectBreadth, rectLength * p,
                            rectBreadth * (end - start));
                    incompleteBar = new Rectangle2D.Double(translatedValue0
                            + rectLength * p, rectStart + start * rectBreadth,
                            rectLength * (1 - p), rectBreadth * (end - start));
                }
                else if (orientation == PlotOrientation.VERTICAL) {
                    completeBar = new Rectangle2D.Double(rectStart + start
                            * rectBreadth, translatedValue0 + rectLength
                            * (1 - p), rectBreadth * (end - start),
                            rectLength * p);
                    incompleteBar = new Rectangle2D.Double(rectStart + start
                            * rectBreadth, translatedValue0, rectBreadth
                            * (end - start), rectLength * (1 - p));
                }

            }

            if (getShadowsVisible()) {
                getBarPainter().paintBarShadow(g2, this, row, column, bar,
                        barBase, true);
            }
            getBarPainter().paintBar(g2, this, row, column, bar, barBase);

            if (completeBar != null) {
                g2.setPaint(getCompletePaint());
                g2.fill(completeBar);
            }
            if (incompleteBar != null) {
                g2.setPaint(getIncompletePaint());
                g2.fill(incompleteBar);
            }
            if (isDrawBarOutline()
                    && state.getBarWidth() > BAR_OUTLINE_WIDTH_THRESHOLD) {
                g2.setStroke(getItemStroke(row, column));
                g2.setPaint(getItemOutlinePaint(row, column));
                g2.draw(bar);
            }

            if (subinterval == count - 1) {
                // submit the current data point as a crosshair candidate
                int datasetIndex = plot.indexOf(dataset);
                Comparable columnKey = dataset.getColumnKey(column);
                Comparable rowKey = dataset.getRowKey(row);
                double xx = domainAxis.getCategorySeriesMiddle(columnKey,
                        rowKey, dataset, getItemMargin(), dataArea,
                        plot.getDomainAxisEdge());
                updateCrosshairValues(state.getCrosshairState(),
                        dataset.getRowKey(row), dataset.getColumnKey(column),
                        value1.doubleValue(), datasetIndex, xx,
                        translatedValue1, orientation);

            }
            // collect entity and tool tip information...
            if (state.getInfo() != null) {
                EntityCollection entities = state.getEntityCollection();
                if (entities != null) {
                    addItemEntity(entities, dataset, row, column, bar);
                }
            }
        }
    }

    /**
     * Draws a single task.
     *
     * @param g2  the graphics device.
     * @param state  the renderer state.
     * @param dataArea  the data plot area.
     * @param plot  the plot.
     * @param domainAxis  the domain axis.
     * @param rangeAxis  the range axis.
     * @param dataset  the data.
     * @param row  the row index (zero-based).
     * @param column  the column index (zero-based).
     */
    protected void drawTask(Graphics2D g2,
                            CategoryItemRendererState state,
                            Rectangle2D dataArea,
                            CategoryPlot plot,
                            CategoryAxis domainAxis,
                            ValueAxis rangeAxis,
                            GanttCategoryDataset dataset,
                            int row,
                            int column) {

        PlotOrientation orientation = plot.getOrientation();
        RectangleEdge rangeAxisLocation = plot.getRangeAxisEdge();

        // Y0
        Number value0 = dataset.getEndValue(row, column);
        if (value0 == null) {
            return;
        }
        double java2dValue0 = rangeAxis.valueToJava2D(value0.doubleValue(),
                dataArea, rangeAxisLocation);

        // Y1
        Number value1 = dataset.getStartValue(row, column);
        if (value1 == null) {
            return;
        }
        double java2dValue1 = rangeAxis.valueToJava2D(value1.doubleValue(),
                dataArea, rangeAxisLocation);

        if (java2dValue1 < java2dValue0) {
            double temp = java2dValue1;
            java2dValue1 = java2dValue0;
            java2dValue0 = temp;
            Number tempNum = value1;
            value1 = value0;
            value0 = tempNum;
        }

        double rectStart = calculateBarW0(plot, orientation, dataArea,
                domainAxis, state, row, column);
        double rectBreadth = state.getBarWidth();
        double rectLength = Math.abs(java2dValue1 - java2dValue0);

        Rectangle2D bar = null;
        RectangleEdge barBase = null;
        if (orientation == PlotOrientation.HORIZONTAL) {
            bar = new Rectangle2D.Double(java2dValue0, rectStart, rectLength,
                    rectBreadth);
            barBase = RectangleEdge.LEFT;
        }
        else if (orientation == PlotOrientation.VERTICAL) {
            bar = new Rectangle2D.Double(rectStart, java2dValue1, rectBreadth,
                    rectLength);
            barBase = RectangleEdge.BOTTOM;
        }

        Rectangle2D completeBar = null;
        Rectangle2D incompleteBar = null;
        Number percent = dataset.getPercentComplete(row, column);
        double start = getStartPercent();
        double end = getEndPercent();
        if (percent != null) {
            double p = percent.doubleValue();
            if (plot.getOrientation() == PlotOrientation.HORIZONTAL) {
                completeBar = new Rectangle2D.Double(java2dValue0,
                        rectStart + start * rectBreadth, rectLength * p,
                        rectBreadth * (end - start));
                incompleteBar = new Rectangle2D.Double(java2dValue0
                        + rectLength * p, rectStart + start * rectBreadth,
                        rectLength * (1 - p), rectBreadth * (end - start));
            }
            else if (plot.getOrientation() == PlotOrientation.VERTICAL) {
                completeBar = new Rectangle2D.Double(rectStart + start
                        * rectBreadth, java2dValue1 + rectLength * (1 - p),
                        rectBreadth * (end - start), rectLength * p);
                incompleteBar = new Rectangle2D.Double(rectStart + start
                        * rectBreadth, java2dValue1, rectBreadth * (end
                        - start), rectLength * (1 - p));
            }

        }

        if (getShadowsVisible()) {
            getBarPainter().paintBarShadow(g2, this, row, column, bar,
                    barBase, true);
        }
        getBarPainter().paintBar(g2, this, row, column, bar, barBase);

        if (completeBar != null) {
            g2.setPaint(getCompletePaint());
            g2.fill(completeBar);
        }
        if (incompleteBar != null) {
            g2.setPaint(getIncompletePaint());
            g2.fill(incompleteBar);
        }

        // draw the outline...
        if (isDrawBarOutline()
                && state.getBarWidth() > BAR_OUTLINE_WIDTH_THRESHOLD) {
            Stroke stroke = getItemOutlineStroke(row, column);
            Paint paint = getItemOutlinePaint(row, column);
            if (stroke != null && paint != null) {
                g2.setStroke(stroke);
                g2.setPaint(paint);
                g2.draw(bar);
            }
        }

        CategoryItemLabelGenerator generator = getItemLabelGenerator(row,
                column);
        if (generator != null && isItemLabelVisible(row, column)) {
            drawItemLabel(g2, dataset, row, column, plot, generator, bar,
                    false);
        }

        // submit the current data point as a crosshair candidate
        int datasetIndex = plot.indexOf(dataset);
        Comparable columnKey = dataset.getColumnKey(column);
        Comparable rowKey = dataset.getRowKey(row);
        double xx = domainAxis.getCategorySeriesMiddle(columnKey, rowKey,
                dataset, getItemMargin(), dataArea, plot.getDomainAxisEdge());
        updateCrosshairValues(state.getCrosshairState(),
                dataset.getRowKey(row), dataset.getColumnKey(column),
                value1.doubleValue(), datasetIndex, xx, java2dValue1,
                orientation);

        // collect entity and tool tip information...
        EntityCollection entities = state.getEntityCollection();
        if (entities != null) {
            addItemEntity(entities, dataset, row, column, bar);
        }
    }

    /**
     * Returns the Java2D coordinate for the middle of the specified data item.
     *
     * @param rowKey  the row key.
     * @param columnKey  the column key.
     * @param dataset  the dataset.
     * @param axis  the axis.
     * @param area  the drawing area.
     * @param edge  the edge along which the axis lies.
     *
     * @return The Java2D coordinate.
     *
     * @since 1.0.11
     */
    public double getItemMiddle(Comparable rowKey, Comparable columnKey,
            CategoryDataset dataset, CategoryAxis axis, Rectangle2D area,
            RectangleEdge edge) {
        return axis.getCategorySeriesMiddle(columnKey, rowKey, dataset,
                getItemMargin(), area, edge);
    }

    /**
     * Tests this renderer for equality with an arbitrary object.
     *
     * @param obj  the object (<code>null</code> permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof GanttRenderer)) {
            return false;
        }
        GanttRenderer that = (GanttRenderer) obj;
        if (!PaintUtilities.equal(this.completePaint, that.completePaint)) {
            return false;
        }
        if (!PaintUtilities.equal(this.incompletePaint, that.incompletePaint)) {
            return false;
        }
        if (this.startPercent != that.startPercent) {
            return false;
        }
        if (this.endPercent != that.endPercent) {
            return false;
        }
        return super.equals(obj);
    }

    /**
     * Provides serialization support.
     *
     * @param stream  the output stream.
     *
     * @throws IOException  if there is an I/O error.
     */
    private void writeObject(ObjectOutputStream stream) throws IOException {
        stream.defaultWriteObject();
        SerialUtilities.writePaint(this.completePaint, stream);
        SerialUtilities.writePaint(this.incompletePaint, stream);
    }

    /**
     * Provides serialization support.
     *
     * @param stream  the input stream.
     *
     * @throws IOException  if there is an I/O error.
     * @throws ClassNotFoundException  if there is a classpath problem.
     */
    private void readObject(ObjectInputStream stream)
        throws IOException, ClassNotFoundException {
        stream.defaultReadObject();
        this.completePaint = SerialUtilities.readPaint(stream);
        this.incompletePaint = SerialUtilities.readPaint(stream);
    }

}